NMR and spin-lattice relaxation rate of89Y,63Cu in radiation disordered YBa2Cu3O6.9

Autor:	A. M. Bogdanovitch, Yu. I. Zhdanov, V. V. Serikov, V.V. Lavrentjev, B. A. Aleksashin, M. V. Sadovskii, K.N. Mikhalyov, S. V. Verkhovskii
Rok vydání:	1992
Předmět:	Condensed matter physics Chemistry Relaxation (NMR) Spin–lattice relaxation Analytical chemistry chemistry.chemical_element Knight shift Yttrium Irradiation Spin (physics) Atomic and Molecular Physics and Optics Neutron temperature Electron localization function
Zdroj:	ResearcherID
ISSN:	1613-7507 0937-9347
DOI:	10.1007/bf03166287
Popis:	NMR line shifts and spin-lattice relaxation rates of89Y and63Cu in YBa2Cu3O6.9 were measured in disordered samples irradiated by fast neutrons with a fluence of: ϕ=5·1018 cm−2 (T c ons =70 K), ϕ=1.2·1019 cm−2 (T c ons =20 K), in order to investigate the evolution of spin susceptibility χS under irradiation. According to the data obtained, χS decreases markedly as structural disorder accumulates in the samples. The variation of χS is related closely to that observed in oxygen-depleted YBa2Cu3O7−δ compounds with nearly the sameT c value. The data for yttrium display some features that are absent in oxygen-depleted samples. The different temperature dependence of the89Y and63Cu Knight shifts and the increase of the89Y spin-lattice relaxation rate in irradiated samples are discussed in terms of the electron localization effects arising in the CuO2 planes due to the radiation-induced structural disorder.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5a8511af7dbd97460f7af9780e0d0a9 https://doi.org/10.1007/bf03166287 Zobrazit plný text záznamu Full text from SpringerLink